/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/GroupTopology.h
Add all the Edges connected to the given Corner to the EdgesOut list. This is somewhat expensive as there is no connection from Corners to Edges, must iterate over adjacent faces
void FindCornerNbrEdges ( int CornerID, [TArray](API\Runtime\Core\Containers\TArray)< int > & EdgesOut ) const